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Colchicine-binding protein from phloem and xylem of a higher plant

✍ Scribed by James W. Hart; Dinkar D. Sabnis

Publisher: Springer-Verlag
Year: 1973
Tongue: English
Weight: 310 KB
Volume: 109
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00386122

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✦ Synopsis

Colchicine has been demonstrated by ion-exchange and by gelfiltration assay to bind to a protein fraction derived from the higher plant Heracleum mantegazzianum. Colchicine-binding protein from a plant source was much more unstable than tubulin from animal preparations. The tissues of Heracleum vary in their content of colchicine-binding activity. No activity was obtained from non-vascular tissue. Phloem has at most, twice as much activity as xylem. The significance of these results is discussed in relation to a proposed degree of homology between P protein of phloem and microtubule protein.

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